Fundamental Processes Occurring at Electrodes
Final rept. 15 Jul 87-1 Dec 91,
CALIFORNIA INST OF TECH PASADENA
Pagination or Media Count:
This report summarizes the results obtained during four years 1987- 1991 of research directed at the development of novel, polymeric coatings for electrode surfaces. The coating materials consisted of various polyelectrolytes based on functionalized polysiloxanes, newly synthesized block and random copolymers and commercially available Nafion. Coatings prepared from these materials were examined experimentally to assess their abilities to retain electroactive counterions incorporated within their structures and to provide efficient ionic and electronic conduction pathways across the coatings. The permselectivities of some coatings were tested under both static no current found and dynamic with current flow conditions. A new model to account for the unusual diffusive behavior of counteractions in Nafion coatings was proposed and tested experimentally. The mobilities and counter-ion binding equilibria for a set of soluble polyelectrolytes was examined and new methods developed for evaluation of their diffusion coefficients. The coatings were tested for possible applications in electrocatalysis, electrosynthesis and electroanalysis.
- Polymer Chemistry
- Electrical and Electronic Equipment